Controller functions
Version 1
RES-402
Page 25
The heatsealing band is not heated up if the "START" signal is activated while an error message is indicated.
7.6
"RESET" signal
The RESISTRON
®
temperature controller RES-402 can be reset by means of an external "RESET" signal at
terminals 17+12). As a result:
• A heatsealing cycle is aborted if one is in progress
• No more measuring impulses are generated
• An error message is reset if one is present
(Note: The error message is not reset until the
"RESET" signal is deactivated)
As of SW revision 103, the controller actual value output changes to 0…3°C (i.e. approximately 0VDC) while the
"RESET" signal is being activated. This may be interpreted by the higher-level controller (e.g. a PLC) as feedback.
The "AUTOCAL" function is not aborted if the "RESET" signal is activated while it is still executing.
The controller performs an internal initialization run lasting approximately 500ms after the "RESET"
signal is deactivated. The next heatsealing process cannot be started until it has finished.
If a contactor Kb is used to deactivate the control loop
(
section 5.3 "Power supply" on page 10
)
,
it must be reliably energized again 200ms at the latest after the "RESET" signal is deactivated (note
the contactor switching and delay times). If it is energized too late, an error message will be output by the
controller.
RES-402
max. 6mA
17
12
RESET
+
-
GND
24VDC
RESET
>0.1s
HIGH:
≥
12VDC
LOW:
≤
2VDC
13
!
!
